DAY 1- SCIENTISTS

Question 1

Postulated that all matter is made up of small indestructive units called atoms

Answer 1

Democritus

Question 2

Proposed his atomic theory

Answer 2

John Dalton

Question 3

Created the periodic table and discovered that the properties of elements were periodic functions of their atomic weights

Answer 3

Dmitri Mendeleev

Question 4

Proposed the theory of electromagnetis

Answer 4

James Clerk Maxwell

Question 5

Proposed that electricity was made of discrete negative particles he called electrons

Answer 5

George Stoney

Question 6

Made experiments with cathode ray tubes demonstrating that cathode rays have a negative charge

Answer 6

Sir William Crooke

Question 7

Used cathode ray tubes to study canal rays which had electrical and magnetic properties opposite of an electron

Answer 7

Eugene Goldstein

Question 8

Discovered that certain chemicals glowed whwn exposed to cathode rays. He named these X-rays

Answer 8

Wilhelm Roentgen

Question 9

Discovered radiation by studying the effects of X-rays on photographic film

Answer 9

Henri Becquerel

Question 10

Used cathode ray tubes to determine the charge to mass ration of an electron

Answer 10

Joseph John Thomson

Question 11

Discovered alpha, beta and gamma rays in radiation

Answer 11

Ernest Rutherford

Question 12

Theorized that radioactive particles cause atoms to breakdown releasing radiation that takes the form of energy and subatomic particles. Discovered Polonium and Radium

Answer 12

Pirerre and Marie Curie

Question 13

proposed the idea of quantization to explain how a hot, glowing object emiitted light

Answer 13

Max Planck

Question 14

Margaret Todd

Answer 14

Coined the term isotope

Question 15

Discovered that there appeared to be more than one element at each position on the periodic table

Answer 15

Frederick Soddy

Question 16

Found that noble gases have stable electron configurations

Answer 16

Richard Abegg

Question 17

Created the theories of relativity and hypothesized about the particle nature of light

Answer 17

Albert Einstein

Question 18

Invented a device that could detect alpha particles

Answer 18

Hans Geiger

Question 19

Determined the charge of an electron through his oil drop experiment

Answer 19

Robert Millikan

Question 20

Performed the alpha particle experiment and established that nucleus was very dense, very small and + charged

Answer 20

Ernest Rutherford

Question 21

Discovered that the number of protons in an elemement determines its atomic number

Answer 21

Henry Moseley

Question 22

Developed the Bohr atomic model, with electrons travelling in orbits around the nucleus

Answer 22

Neils Bohr

Question 23

Proposed that electrons have a wave particle duality

Answer 23

Louis de Broglie

Question 24

Developed the Schrödinger equation which describes the quantum state of a system changes with time

Answer 24

Erwin Schrodinger